, Berk.
Mitremyces, Nees.
Geaster, Mich.
Diplocystis, B. & C.
Diploderma, Link.
Trichaster, Czern.
Broomeja, Berk.
Coilomyces, B. & C.
Lanophila, Fr.
Eriosphaera, Reich.
Bovista, Dill.
Calvatia, Fr.
Lycoperdon, Tourn.
Hippoperdon, Mont.
Scleroderma, Pers.
Castoreum, C. & M.
Xylopodium, Mont.
Areolaria, Forquigu.
Phellorina, Berk.
Favillea, Fr.
Polygaster, Fr.
Polysaccum, D. C.
Testicularia, Klotzsch.
Arachnion, Schw.
Scoleciocarpus, Berk.
Paurocotylis, Berk.

IV.--HYMENOGASTRACEAE (HYPOGAEI).

Hysterangium, Vitt.
Octaviania, Vitt.
Rhizopagon, Fr.
Melanogaster, Corda.
Hymenogaster, Vitt.
Hydnangium, Walk.
Gautieria, Vitt.
Macowanites, Kalchbr.

BIBLIOGRAPHY.

E. Fischer, etc. "Gasteromycetae," Saccardo, _Sylloge Fungorum_. Vol.
vii, part i. Padua, 1888.

Chas. H. Peck. "United States species of Lycoperdon."

Geo. Massee. "Monograph of the British Gasteromycetes." _Annals of
Botany,_ Nov., 1889. "Monograph of the Genus Lycoperdon" in _Journal
Royal Micro. Soc._ London, 1887.

C. Bambeke. _Morphologie du Phallus impudicus._ Gand, 1889.

A. P. Morgan. "North American Geasters" in _American Naturalist_. Roy.
8vo. 1887.

L. and C. Tulasne. "Essai d'une Monographie des Nidulariees." Ann. des
Sci. Nat. 8vo. Paris, 1844.

M. C. Cooke. _The Myxomycetes of Great Britain._ Plates. 8vo. London,
1877. _The Myxomycetes of the United States_, by the same author. New
York, 1877.

Geo. Massee. _A Monograph of the Myxogasters._ Col. plates. Roy. 8vo.
London, 1892.

A. De Bary. "Die Mycetozoon" (_Schleimpilz_). Plates. 8vo. Leipzig,
1864.

J. Rostafinski. _Sluzowce, Mycetozoa Monografia._ Plates. 4to. Paris,
1875.

Geo. A. Rex. New American Myxomycetes. Proc. Acad. Nat. Sci. Phila.,
part iii, Dec. 16, 1890, pp. 436-438.

Balliet Letson. "Slime Molds." The Ornithologist and Botanist. Vol. i.
Binghamton, N. Y., Nov., 1891, p. 85. 1 col.

Thos. H. McBride. "The Myxomycetes of Eastern Iowa." Bulletin from the
Laboratories of Natural History of the State University of Iowa. Iowa
City, Iowa, 1892.

AGARICINI.

_Subgenus Lepiota_ Fries. Veil universal and concrete, with the cuticle
of the pileus breaking up in the form of scales. Gills typically free,
often remote, not sinuate or decurrent. Stem generally distinct from the
hymenophore. Volva abs